Some of the low cost laptops shipped with super tiny drives (like 32 or 64GB). Since you are out of space you are going to have to open this guy up and put in a larger driver. The the exact warning I would give a customer is.'We can install W10 but some things might not work because we don't see drivers from the manufacturer'. Even though Win8 and Win10 share some code, they are not 100% compatible. I run an IT shop and the first thing we do before we upgrade a laptop for someone from one OS to another is to check that the manufacturer offers drivers for that newer OS for their product.
